Denial of Service Vulnerability in zstd-jni by Luben
CVE-2026-89045

5.1MEDIUM

Key Information:

Vendor

Luben

Status
Zstd-jni
Vendor
CVE Published:
10 September 2026

What is CVE-2026-89045?

The zstd-jni library, specifically versions 1.4.8-4 through 1.5.7-13, contains a vulnerability due to inadequate validation of negative length parameters in the ZstdInputStreamNoFinalizer.read() method. This flaw can be exploited by attackers who supply negative length values, leading to infinite loops within the read method. As a result, the method can block all other threads accessing the stream, creating a denial of service condition. It is imperative for users of affected versions to upgrade to version 1.5.7-14 or later to mitigate this issue.

Affected Version(s)

zstd-jni 1.4.8-4 < 1.5.7-14

References

https://github.com/luben/zstd-jni/security/advisories/GHS...
vendor-advisory
https://github.com/luben/zstd-jni/commit/dd08685ef913a32e...
patch
https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main...
technical-description

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yu Bao, PayPal Cyber Security Team
.